radar52,You are using CTR. I'd disable it to see if the SM buttons show again. BTW, the session manager icon in the right panel is from TMP. Could it be that you use TMP session manager and SM (this ext.) is not enabled?

I think this is the best session management extension for firefox. Like other people i also need it for Firefox Quantum. I'm willing to make a donation if that helps, but i couldn't find a donate link.

in some point you are right - ti rudder back - "MySessions" is buggy it dont save settings. "sessions" (tabs) itself are save into "other bookmarks". i went back to "tab session manager". sorry for this enthousiastic news, looks too good.

users using outdated and vulnerable software probably never will get an answer from me - sticked with the past? stay alone.

Elhem Enohpi wrote:An update for those wondering if/when a Web Extensions version of Session Manager could be possible:

There are some things that Session Manager does that are still not possible to do with Web Extensions until Mozilla provides the interface (API) to do so. These impact all tab/session restoring extensions, not just Session Manager. Also I can't speak for Morac, even if the APIs are implemented, he may or may not port Session Manager to Web Extensions. I suppose it would be a lot of work.

2. Restore sessions without loading all the tabs. Only load the selected tab, and create the others in an unloaded (a.k.a. "discarded") state, until they are clicked on. Important when loading a session with hundreds of tabs!- Status: The function has been approved by Mozilla for Web Extensions, but at the moment nobody is working on implementing it. However it seems possible to be finished soon, as related work is being done.- https://bugzilla.mozilla.org/show_bug.cgi?id=1378647It seems that it would depend on allowing Web Extensions to unload/discard tabs, which is currently being worked on (at least for desktop browsers) and nearly complete, here:- https://bugzilla.mozilla.org/show_bug.cgi?id=1322485

There may be other issues I don't know about, but these seem to be the main ones that remain. If you want to express your support for Mozilla to implement the necessary functions in Firefox, you can get a Bugzilla account and vote for the above bugs, particularly 1378651. Please follow Bugzilla etiquette, and just vote for the bug without commenting. Comments like "you need to fix this!" aren't helpful.